"There's magic, positive magic, in such phrases as: "I may be wrong. I frequently am. Let's examine the facts. - Dale Carnegie

Flattery is telling the other person precisely what he thinks about himself.

"When we are harassed and reach the limit of our own strength, many of us then turn in desperation to God-"There are no atheists in foxholes." But why wait till we are desperate? Why not renew our strength every day? Why wait even until Sunday? For years I have had the habit of dropping into empty churches on weekday afternoons.
When I feel that I am too rushed and hurried to spare a few minutes to think about spiritual things, I say to myself: "Wait a minute, Dale Carnegie, wait a minute. Why all the feverish hurry and rush, little man? You need to pause and acquire a little perspective." At such times, I frequently drop into the first church that I find open.
Although I am a Protestant, I frequently, on weekday afternoons, drop into St. Patrick's Cathedral on Fifth Avenue, and remind myself that I'll be dead in another thirty years, but that the great spiritual truths that all churches teach are eternal. I close my eyes and pray. I find that doing this calms my nerves, rests my body, clarifies my perspective, and helps me revalue my values. May I recommend this practice to you?"

Over three hundred years ago Galileo said: You cannot teach a man anything; you can only help him to find it within himself.